o.k. i made some tests in my testing environment, there i have the same problem and i'm using LDAPS too.

I joined the VCSA to the domain, but this has no change, only join isn't enough.

After deleting the LDAPS identity source and created a Machine Account identity source, i was able to connect to the vCenter in the PowerShell without entering my credentials.

So with IWA the login with the AD session is working but not with LDAPS.

Will this work with LDAPS? Or is this a limitation in LDAPS?